Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
Rocky Hill's January weather, marked by an average high temperature of 36.9°F (2.7°C) and an average low temperature of 24.3°F (-4.3°C), is the coldest in the year.Humidity
The average relative humidity in January in Rocky Hill is 75%.Rainfall
In Rocky Hill, New Jersey, in January, during 6.1 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Rocky Hill, during the entire year, the rain falls for 119.3 days and collects up to 12.72" (323mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Rocky Hill, New Jersey, during January, snow falls for 4.6 days and regularly aggregates up to 0.79" (20mm) of snow. Throughout the year, in Rocky Hill, there are 16.4 snowfall days, and 4.41" (112mm) of snow is accumulated.Daylight
In January, the average length of the day in Rocky Hill is 9h and 41min.On the first day of January in Rocky Hill, sunrise is at 7:21 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:14 pm EST.
Sunshine
In January, the average sunshine in Rocky Hill, New Jersey, is 5.1h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for the average person.Note: A maximum daily UV index of 2 during January morphs into the following directions:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
What part of the year is the coldest in Rocky Hill?
How cold is January in Rocky Hill?
What is the average humidity in January in Rocky Hill?
How many days does it rain in January in Rocky Hill?
How many days does it snow in January in Rocky Hill?
What is the average length of the day in January in Rocky Hill?
When is the sunrise / sunset in January in Rocky Hill?
How many hours of sunshine does Rocky Hill have in January?
What are the months with the lowest UV index in Rocky Hill?
What is the UV index intensity in January in Rocky Hill?
Average temperature in January
Rocky Hill, NJ
- Average high temperature in January: 36.9°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in January: 24.3°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in January
Rocky Hill, NJ
- Average pressure in January: 30.07"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Rocky Hill, NJ
- Average wind speed in January: 8.5mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in January
Rocky Hill, NJ
- Average humidity in January: 75%
The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in January
Rocky Hill, NJ
- Average rainfall in January: 0.71"
The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is September (0.67").
Average rainfall days in January
Rocky Hill, NJ
- Average rainfall days in January: 6.1 days
The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in January
Rocky Hill, NJ
- Average snowfall in January: 0.79"
The month with the highest snowfall is March (1.42").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in January
Rocky Hill, NJ
- Average snowfall days in January: 4.6 days
The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Rocky Hill, NJ
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in January
Rocky Hill, NJ
- Average sunshine days in January: 21.8 days
The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in January
Rocky Hill, NJ
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in January
Rocky Hill, NJ
- Average cloud cover in January: 44
The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in January
Rocky Hill, NJ
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Rocky Hill, New Jersey, USA
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